Microsoft's stock market value has surpassed Apple's and pulled ahead by as much as $US3 billion as the Windows software-maker benefited from optimism about demand for cloud computing services.
Shares of Microsoft jumped 3 per cent, pushing its market capitalisation up to $US848 billion ($A1.2 trillion) on Wednesday.
With the broad market rebounding following a recent slump, Apple also rose, but less than Microsoft. Its 2.17 per cent increase put Apple's market capitalisation at $8US45 billion, just four months after the iPhone maker breached the $US1 trillion mark for the first time.
Microsoft and Apple briefly traded at about the same level after the bell on Monday, but Microsoft's intraday lead over Apple on Wednesday was more substantial.
Both companies' market capitalisations were calculated using outstanding shares reported in their most recent 10-Q filings.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Apple's market capitalisation overtook Microsoft's in 2010 as the Windows seller struggled with slow demand for personal computers, due in part to the explosion of smartphones driven by Apple's iPhone.
Since then, Microsoft has not ended an official trading session with a stock market value greater than Apple's.
Shares of several cloud software makers also rose on Wednesday after Salesforce.com's upbeat quarterly earnings boosted Wall Street's expectations for the fast-growing sector, which faced pressure in the recent sell-off in technology stocks.
Since Satya Nadella took over as chief executive in 2014, Microsoft has reduced its reliance on Windows software for PCs and became a major player in cloud computing, second only to Amazon.com.
In recent months, technology shares have been punished due to investor worries about rising interest rates and fallout from the trade war between the United States and China.
But Apple has suffered more than other Silicon Valley stalwarts, down 19 per cent since the iPhone maker warned on November 1 that sales for the crucial holiday quarter would likely miss Wall Street expectations.
Global demand for smartphones has slowed in recent years, making it more difficult for Apple to increase its revenue.
Thirty-three analysts recommend buying Microsoft's stock, while just one has a negative rating and another has a neutral rating, according to Refinitiv data.
